Service Manual -
DVC 09/12/18/24 SF Series
32
37
8.2.2
Indoor / outdoor unit’s communication
diagnosis and solution
(E1)
Error Code
E1
Malfunction conditions Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Possible
causes
●
Wiring
error
●
Indoor or outdoor PCB faulty
Troubleshooting:
Yes
No
Yes
No
No
Yes
No
Yes
No
Power off, then restart the unit 2 minutes later.
Is the error extinguished?
Measure Vs. Is the voltage moving
alternately between -25V to 25V?
Replace the reactor
Check the indoor wiring connection.
Is the wiring correct?
Check the outdoor wiring connection.
Is the wiring correct?
Replace the indoor main PCB.
Power on. Is the error
extinguished?
I
s the reactor
normal?
Replace the outdoor main PCB.
Replace the outdoor main
PCB. Power on. Is the error
extinguished?
Replace the indoor main PCB.
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